Heise Pro Series LED Bulbs - Fits D4S, D4R

The Heise Pro Series D4S / D4R LED Bulbs (HE-D4CPRO) light up the trail like daylight with a massive 16,000 lumens of crisp white light — dramatically outshining standard HID and halogen lighting — in a direct plug-and-play format compatible with both D4S and D4R sockets. Built for off-road enthusiasts and performance-minded drivers who want to upgrade aging HID systems, the D4 Pro Series combines an extreme LED chipset with an all-metal housing and a 2 mm solid copper thermodynamic core that keeps operating temps locked at just 46.1°C (115°F). Wide 12-24V input voltage compatibility makes these a versatile upgrade across a broad range of vehicles and applications.

Running at 70W per set, the D4 Pro's IC thermal controller pairs with a high-speed smart fan to actively pull heat away from the diodes — extending LED life and maintaining consistent output even under sustained use. The fully rotatable collar lets you fine-tune the beam pattern for perfect cutoff alignment in projector housings (the standard housing type for D4S / D4R applications), while built-in reverse polarity protection means you can't wire it wrong. The integrated EMI filter keeps your radio, GPS, and CB completely static-free. Backed by a 3-year limited warranty, this is the D4S / D4R LED upgrade that serious enthusiasts have been waiting for.

The D4 Pro Series is compatible with any vehicle running a D4S or D4R HID socket — a fitment found on a wide range of Japanese and European luxury vehicles, performance cars, and trucks equipped with factory HID projector headlights. Installation replaces the OEM HID bulb directly; in most cases the factory ballast is bypassed or removed. For vehicles with CANBUS systems, a CANBUS decoder may be required to prevent error codes. Intended for off-road use only.

Why Choose the Heise D4S / D4R Pro Series LED Bulbs?

• 16,000-Lumen Output: Massively brighter than aging HID xenon output for dramatically improved night visibility on and off the trail.
• D4S & D4R Compatible: Single kit fits both D4S and D4R sockets — covers a wide range of factory HID projector headlight applications.
• 12-24V Input Voltage: Wide voltage range makes these compatible with both standard 12V automotive and 24V truck/commercial applications.
• 2 mm Solid Copper Thermodynamic Core: Efficiently pulls heat away from the LED chipset, extending bulb life and maintaining consistent output under sustained use.
• IC Thermal Controller + Smart Fan: Active cooling system keeps operating temps at just 46.1°C even during extended high-output use.
• Rotatable Collar: Dial in your exact beam pattern for proper cutoff alignment in D4S / D4R projector housings.
• Built-In EMI Filter: Eliminates radio static and interference — critical for vehicles running CB, ham radio, or GPS systems.
• 3-Year Limited Warranty: Heise stands behind the D4 Pro Series with one of the strongest warranties in the LED headlight segment.

Installation & Compatibility Recommendations

The Heise D4S / D4R Pro Series installs directly into any D4S or D4R socket. In most applications, the factory HID ballast is bypassed or removed during installation — these are LED bulbs that do not require a ballast to operate. The rotatable collar should be adjusted after installation with the headlights aimed at a wall to confirm proper beam cutoff. For vehicles with CANBUS error detection (common on Japanese and European luxury vehicles), a CANBUS decoder is recommended to prevent flickering or error codes. Intended for off-road use only.

Full Specifications

Frequently Asked Questions

Do I need to keep my factory HID ballast?
No — the Heise D4 Pro Series are LED bulbs that do not require a ballast to operate. In most installations, the factory HID ballast is bypassed or removed. Consult your vehicle's wiring diagram or a professional installer if you're unsure about your specific application.

Can I use these for daily driving?
The D4 Pro Series is labeled for off-road use only, as aftermarket LED kits are not DOT-certified for on-road use in the US. Many enthusiasts use them for off-road, overlanding, and trail driving where DOT compliance is not required.

Will these work in my projector headlight housing?
Yes — D4S and D4R sockets are exclusively used in projector headlight housings. The rotatable collar allows you to fine-tune the LED chip orientation for proper beam cutoff alignment.

Do I need a CANBUS decoder?
On many Japanese and European luxury vehicles with CANBUS monitoring, a decoder is recommended to prevent error codes or flickering. On older or simpler wiring systems, no decoder is typically needed.